Dimensioning and metrology

This course provides the basic tools required for the functional dimensioning of mechanical systems. After a presentation of one-dimensional dimensioning and its limitations, "3D" geometric tolerancing (GPS), in accordance with ISO standards, is introduced in order to learn how to read and then write a geometric tolerance according to the functional requirements of a part in a mechanical system. The study of the hyperstaticity of the mechanism and links then enables the functional conditions required to ensure the assembly and correct operation of the system to be established. Dimensional and geometric tolerances are then determined by setting up and resolving dimensional chains. Finally, once the parts have been manufactured, it is necessary to carry out metrological checks and verify their conformity with the functional dimensioning.

• Understand the origin of the need for dimensioning in relation to hyperstaticity problems in mechanical systems,
• Know how to read and write a dimensional or geometric specification according to the ISO standard (3D dimensioning),
• Understand the consequences of the quotation,
• Know how to establish and determine tolerance intervals for the functional dimensioning of a part using (one-dimensional) dimension chains,
• Know the basics of metrological control of a part,
• Check a geometric specification using a coordinate measuring machine.

• Manufacturing processes,
• Technical communication, CAD,
• Hyperstaticity of mechanical systems

Recommended prerequisites* :

• Metrology concepts

CC + TP